2008-009 (4) - Laserfiche WebLink

Home Browse Search

n 4. The Contractor must submit his plan for testing to the Engineer for review at least five (5) working days before starting the test The Contractor shall remove and adequately r dispose of all blocking material and equipment after completion and acceptance of the field hydrostatic test, unless otherwise directed by the Engineer. Any damage to the pipe coating shall be repaired by the Contractor. Lines shall be totally free and clean r prior to final acceptance. 5. The Engineer or the Engineer's representative must be present during testing. 6. No thrust blocks shall be backfilled until inspected by IRCDUS inspectors. 7. Before the pressure testing of new pipelines against existing Indian River County valves can commence, the lines shall be properly chlorinated, sampled, and bacteriologically approved. W H. Disinfecting Potable Water Pipelines 1. Before being placed in service, all potable water pipelines shall be chlorinated in we accordance with the latest AWWA C-651, "Standard Procedure for Disinfecting Water Mains." The procedure shall be approved by the Engineer. The location of the chlorination and sampling points will be as specified by the Florida Department of r Environmental Protection, Water Distribution System Permit. Taps for chlorination and sampling shall be uncovered and balled by the Contractor, as required. 2. The general procedure for chlorination shall be first to flush all dirty or discolored water from the lines, and then introduce chlorine in approved dosages in accordance with Table 1-1 through a tap at one end, while water is being withdrawn at the other end of the line. The chlorine solution shall remain in the pipeline for no less than 24 hours. r 3. Following the chlorination period, all treated water shall be flushed form the lines at their extremities and replaced with water from the distribution system. Bacteriological +. sampling and analysis of the replacement water shall then be made by the Engineer in full accordance with the AWWA Manual M23. The Contractor will be required to re - chlorinate, if necessary. The line shall not be placed in service until the requirements of the State and County Environmental Health Department are met. 4. Special disinfection procedures shall be used in connections to existing mains, and where the method outlined above is not practical. 5. The Contractor shall make all arrangements necessary with an independent commercial laboratory approved by the Department of Health & Rehabilitative Services (HRS) for r the collection and examination of samples of water from disinfected water mains. These samples shall be examined for compliance with HRS requirements. Sampling shall be made daily and continuously until two (2) successive examinations are found satisfactory. Should three examinations be found unsatisfactory, the line shall be flushed and disinfected again. Certified copies of all laboratory analysis shall be provided to the Owner. The cost of all sampling, flushing, and disinfecting shall be included in the contract price, and no additional charge shall be made to the Owner for this work. County personnel shall operate all valves and be present to determine and control the volume of water used for flushing.